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BIO NMDCAT Concept of Evolution
nmdcat.online July 14, 2026

1. Regarding the origin of life, which statement best explains the concept of chemical evolution?

A. Living cells arose directly from inorganic matter in one step.
B. Simple inorganic molecules gradually formed complex organic molecules before the first cells appeared.
✓
C. The first organisms were created in their present form.
D. Life originated only after oxygen accumulated in the atmosphere.

📝 Explanation

Correct: Chemical evolution proposes that simple molecules reacted over time to produce complex organic compounds, eventually leading to the first living systems. A: Incorrect, life did not appear in a single step. C: Reflects special creation, not evolution. D: Early atmosphere lacked free oxygen. Concept: Chemical evolution.

📖 Additional Information

  • Living cells arose directly from inorganic matter in one step.
  • Simple inorganic molecules gradually formed complex organic molecules before the first cells appeared.
  • The first organisms were created in their present form.
  • Life originated only after oxygen accumulated in the atmosphere.

Correct: Chemical evolution proposes that simple molecules reacted over time to produce complex organic compounds, eventually leading to the first living systems. A: Incorrect, life did not appear in a single step. C: Reflects special creation, not evolution. D: Early atmosphere lacked free oxygen. Concept: Chemical evolution.

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